baber/WOPTO huggingface dataset:
Patent GB-1345576-A (GB)
Title: Electrical high frequency devices
IPC: H05B6/76
Filed: 1971-04-19
Abstract: 1345576 Aerials; microwave oven HUSQVARNA VAPENFABRIKS AB 19 April 1971 [4 March 1970 10 March 1970] 22929/71 Headings H4A and H5H [Also in Division H1] A backward-wave slow-wave structure 1, and adjacent conductor 5, operated in the frequency range over which the structure supports a pair of coupled waves propagated in opposite directions with increasing and decreasing amplitude, respectively, is employed as an antenna, or as a choke (see Division H1) in microwave apparatus. For a wave propagated towards the left between conductors 3 and 4 in the antenna arrangement of Fig. 1, the structure 1 produces a decreasing amplitude, together with a wave of increasing amplitude propagated in the reverse direction, which is coupled out through the transmission line 6, 7. Conversely, a wave coupled into the structure 1 through line 6, 7 suffers a decreasing amplitude, an increasing amplitude wave being generated to propagate in the reverse direction between conductors 3 and 4. If line 6, 7 is omitted, the arrangement operates as a simple choke. In the microwave furnace of Fig. 15, waves from antenna 46 are propagated around the oven surfaces 42, 43, 44, and 45, the propagation being further restricted to this path by a conductive helix, or closed conductive loops 52-formed by photo etched conductive strips on a dielectric basespaced and insulated from the oven walls, and acting as the conductive surface 4 of Fig. 1. The material to be heated may be placed upon a conductive surface 48, disposed above the antenna, insulated therefrom by dielectric legs 49, acting as the surfaces 2 and 3 of Fig. 1, and in the form either of an aluminium plate, or of a plastics or ceramic material bearing conductive strips which either form closed loops or a continuous helix extending parallel to the strips 52. If in the form of a helix, the antenna can be coupled to its end turn adjacent the back of the oven, and energy not absorbed by the goods to be heated can be absorbed by a further antenna adjacent the oven opening 41, or reflected either by a further slowwave structure acting as a choke, or by forming the end turn of the helix as a closed loop. The plate 48 can be attached to the oven door, so that it is automatically moved away from the antenna 46 upon opening the oven, thereby preventing the transmission of energy into the oven. A conveyer microwave furnace employing slow-wave structure antennae and chokes is also described (Figs. 13 and 14, not shown), and suitable forms of slow-wave structure are disclosed (see Division H1).
Patent GB-1100514-A (GB)
Title: Strapping tool
IPC: B65B13/34
Filed: 1966-05-24
Abstract: 1,100,514. Strap tensioning tools. SIGNODE CORPORATION. 24 May, 1966 [24 May, 1965], No. 23142/66. Heading F2G. [Also in Division B6] A pneumatically-operable strapping tool for tensioning a loop of strapping about an article A, the loop having overlapping free end and feed end portions 42 threaded through a seal 46, and for thereafter crimping the seal about the overlapping portions, comprises a frame adapted to rest upon the article, a strap tensioning assem bly 14, a sealing assembly 16, and a strap shearing unit 48. The tensioning assembly 14 includes a pneumatic motor 30 connected through a gear reducer 32 to a strap tensioning wheel 34 between which and a co-operating back-up roller 36 the strap end 40 is fed. Upon first depression of a lever 24 a piston-cylinder unit 50 moves the assembly to a lowered position wherein its axis is coincident with the line y-y to engage the strap between the wheel and roller. When the strapping has attained the necessary tension the lever is again depressed and actuation of a piston-cylinder unit 52, Fig. 6, effects the seal crimping operation which is followed by actuation of the shearing unit 48 to sever the strapping S near the crimped seal. After the severing operation the tool is automatically operable to restore the assemblies 12, 14 and 16 to their original positions as shown in Fig. 1. The seal crimping unit comprises a piston-cylinder device 52 the plunger 162 of which is fixed to a crosshead 160 the cross-pin 158 of which is guided in a slot 156 in one plate 152 of a pair of plates. Pins 168 support a plate 166 between the plates 152 and pivoted on the pins are members 170 having seal-retaining and crimping jaws 172 and connected to spreader links 174 connected to the pin 158. The piston 164 is yieldingly biased downwardly by a spring 182 so that when the lower region of the cylinder 126 communicates with the atmosphere, the piston is forced downwardly by the spring to move the jaws 172 into holding engagement with the seal 46 under slight pressure insufficient to crimp the seal; air is subsequently supplied to the cylinder to augment the action of the spring and to force the piston to its fully advanced position whereby the seal is fully crimped. The shearing unit 48 includes a cutter 97 pressed by a spring 98 to a raised position and is adapted to be forced downwardly by engagement with the pin 158 on the crimping unit after the crimping operation has been completed. Operation of the tool is effected under the control of two valve assemblies (200), (202), Fig. 7 (not shown), and actuation of the valves is effected under the control of a compound lever and latch mechanism and the lever 24. A spring-pressed detent ball 93 co-operates with a pin 94 to grip the strapping as the latter emerges from the wheel 34 so that the feed end of the strapping is readily accessible for the next strapping opera tion.
Patent GB-1428815-A (GB)
Title: Semiconductor devices
IPC: H01L23/04
Filed: 1973-05-15
Abstract: 1428815 Semi-conductor devices INTERNATIONAL RECTIFIER CORP 15 May 1973 [15 May 1972] 23145/73 Heading H1K A semi-conductor device (Figs. 1, 2) comprises a monocrystalline Si diode wafer 10 whose faces receive, e.g. Mo expansion plates outwardly coated with softer metal and lapped flat to contact Cu polepieces 11 ,12; the wafer being edge passivated and the polepieces comprising reduced pedestals 13, 14 presenting inward coated surfaces connectible by pressure members (not shown). Centring openings 17, 18 and 19, 20 are provided in the inner and outer surfaces, and insulant ring 21 of L-section engages pedestal 4 and retains wafer 10 resting on the pedestal. Flexible headers 25, 26 contain inwardly convoluted discs 27, 28 soldered to the polepieces at 31, 32 with axial flanges 29, 30 engaging circular slots 34, 35 of an insulant, e.g. premoulded plastic ring 33, which are filled with, e.g. epoxy adhesive then heat cured under pressure on the polepieces; header 25 being perforated to allow escape of air and then soldered tight. The assembly may be filled with inert gas and clamped in use between terminal surfaces compressively engaging surfaces 15, 16. Diode wafer 10 is replaceable (Fig. 3, not shown) by a controlled rectifier with a gate lead extending radially of the upper surface to a conductive tube radial of ring 33, to which it is clamped by flattening and sealed by soldering.
Patent GB-1186796-A (GB)
Title: Dressing for Wounds
IPC: B32B27/00
Filed: 1968-05-15
Abstract: 1,186,796. Surgical dressings. PARACHEM CORP. 15 May, 1968 [31 May, 1967], No. 23193/68. Heading A5R. Laminated dressings for wounds, which can be absorbed by the body, comprise a laminated structure made up of two continuous layers of film-forming material arranged face to face, both layers being plasma-soluble, one layer constituting a primary layer adapted to be applied directly to the wound, and being more readily soluble in plasma than the other layer, the other layer constituting a secondary layer serving as a backing for said primary layer. The primary layer is preferably haemostatically active and may be composed of sodium carboxymethyl cellulose or hydroxyethyl cellulose, and may be in dense or aerated or porous form. The secondary layer may be composed of a cellulose derivative such as methyl cellulose or cellulose hydroxyalkyl ether. Additives may be incorporated in the primary layer, e.g. antiseptic, medicinal, germicidal and/or antibiotic materials such as iodine, sulphanilamide, sulphathiazole or sulphadiazine; plasticizers such as saturated aliphatic alcohols having up to 6 hydroxy groups; and humectants such as polyethylene glycols, triethanolamine, sorbitol and alkanolamine sulphamates.
Patent GB-710623-A (GB)
Title: Holder for photographic film
IPC: G03B27/62
Filed: 1952-09-17
Abstract: 710,623. Photographic film holders. AGFA CAMERA-WERK AKT.-GES. Sept. 17, 1952 [Sept. 19, 1951], No. 23386/52. Classes 97(1) and 98(1) A film holder for photographic enlarging or optical projection apparatus grips the film marginally while leaving the edges free and flexes the free marginal areas in a direction opposite to the direction of the inherent curvature of the film to such a degree that the main body of the film adopts a substantially flat position without the necessity for a glass support. As shown, the supporting frame 1 has an image aperture 2 and guide bars 3 with inclined outer edges 3a. The film 4 (shown in lateral section) is laid over the gate 2. The emulsion side, which faces down, tends to be concave. The film is pressed by ribs 8a on a pressure frame 7 hinged to frame 1. The film edges 4a outside ribs 8a are curled upward by the edges 3a of bars 3, with the result that the part of the film in the gate is substantially flat.
Patent GB-907217-A (GB)
Title: Improvements relating to resilient joints
Inventor: HUTTON PHILIP CHARLES
IPC: F16D3/28
Filed: 1958-07-21
Abstract: 907,217. Universal joints. SILENTBLOC Ltd. July 14, 1959 [July 21, 1958; Sept. 4, 1958], Nos. 23408/58 and 28484/58. Class 80 (2). [Also in Group XXXII] A flexible joint for resilient shaft couplings &c. comprises a rigid inner member 17, Fig. 4, of part-spherical or barrel shape and an outer cylindrical sleeve 20 with a bonded intermediate bushing 10 of resilient material having greater thickness towards its ends. In one example the bushing 10, Fig. 1, in its free state is of cylindrical inner form 11 and concave on its outer surface 18 and is forced over the inner member 17 during assembly and secured by adhesives. Alternatively the bushing may be moulded on the inner member 17. The bushing is compressed axially at one or both ends by washers 27 held in position by oirclips 23. In a modification (not shown) one end of the outer sleeve 20 is closed by an end wall which is shaped to retain the end of the bush. In another example a resilient bush 71, Fig. 9, is moulded around an inner spherical bush 61 arranged in the mould between end rings 72, 73 and the assembly is inserted in an outer cylindrical casing 70 and held in position by flanging the ends as at 76.
Patent GB-532068-A (GB)
Title: Improvements in or relating to electric communication systems
IPC: H03F1/54
Filed: 1939-08-15
Abstract: 532,068. Repeating systems. SIEMENS BROS. & CO., Ltd., ROSEN, A., and CRUTCH, L. S. Aug. 15, 1939, No. 23559. [Class 40 (iv)] In an unattended repeater having a superfluity of valves, a rotary switch for connecting up the valve or valves to be used is operated by the interruption of alternating current fed from a control station, this current providing also the power for the valves. In the arrangement shown, in which different frequency bands are employed for the two directions, an amplifier comprising valves TV1-3 is provided at the station B for the currents of the higher frequency band. A.C. of commercial frequency is fed over the cable and passes to a transformer MT having three secondary windings for supplying anode potential to the valves in parallel, heating current to one of the valves according to the position of the switch S and operating current to the switch magnet M. If the contact x is egarded as permanently closed, the switch S may be stepped by interruption of the A.C. supply by means of a key K1 at the control station A. To avoid continued energization of the magnet M, however, it may be controlled by a relay X which responds to a pilot current, either direct or alternating, transmitted by means of a key K2. The position of the switch S may be indicated by a similar switch at the control station. The switch S may also connect up other electrodes of the valves.
Patent GB-828928-A (GB)
Title: A composite fabric and method of making same
IPC: B32B38/08
Filed: 1956-07-31
Abstract: 828,928. Laminates; impregnating for electrical insulation. RAYBESTOS-MANHATTAN Inc. July 31, 1956 [Aug. 12, 1955], No. 23577/56. Drawings to Specification. Class 140. A composite fabric comprises an open mesh woven glass cloth and fibrous material filling the meshes of said cloth, said material being principally carded spinning grade asbestos fibres in substantially random disposition and interlocked with one another and with the yarns of the glass cloth. The fibrous material may consist of asbestos fibres only or may comprise a carded mixture of spinning grade asbestos fibres and glass or organic carrier fibres, of e.g. rayon, cotton, nylon, or polyacrylonitrile or polyethylene terephthalate. The fabric may be made by passing the woven glass cloth with the fibrous webs on one or both sides of it between pressure rolls, one of which may be of rubber, while the other may be a steel calender roll. The fabric may be used as such or may be impregnated with a varnish, natural or synthetic rubber or a synthetic resin, e.g. polyvinyl acetate, polyvinyl chloride, polytetrafluorethylene, polymonochlorotrifluoroethylene, or thermosetting resins, or sized with starch. The fabrics impregnated with a solution of a resin or drying oil in a volatile solvent, pigmented or otherwise may be used as electrical insulation. Several layers of the fabric may be impregnated with thermoplastic or thermosetting resins, e.g. phenol-aldehyde, silicone or epoxy resins and laminated, as flat sheets or moulded to shape.
Patent GB-299445-A (GB)
Title: Improved process for the manufacture of alkali iodates and its application to the manufacture of oxygen
IPC: C01B13/02
Filed: 1928-08-16
Abstract: 299,445. I. G. Farbenindustrie Akt.- Ges. Oct. 28, 1927, [Convention date]. Addition to 290,749, [Class 1 (iii), Oxides &c., Metallic]. Oxygen.-The production of alkali iodates by causing oxygen to react upon melts of alkali iodides in the presence of an alkali hydroxide, described in the parent Specification, is carried out with the addition also of the oxide or hydroxide of another metal or mixtures of such oxides &c. Gases containing oxygen may be used. Earth metal or heavy metal oxides may be employed, and the process may be applied to the manufacture of oxygen by decomposing the iodate formed into oxygen and iodide, and repeating the cycle of formation and decomposition of iodate. In examples, a melt of potassium hydroxide and iodide to which 1 per cent of bismuth oxide has been added is treated with air at 525‹ C., and the iodate formed then decomposed at 600‹ C., and a similar melt to which 4 per cent of aluminium hydroxide has been added' is treated with air at 450‹ C. and the iodate formed then decomposed at 575‹ C. The Specification as open to inspection under Sect. 91 (3) (a) refers to the use of solutions of the iodide and hydroxide. This reference does not appear in the Specification as accepted.
Patent GB-425744-A (GB)
Title: Improvements in gas-masks
IPC: A62B18/08
Filed: 1934-08-16
Abstract: 425,744. Gas -masks. SENFT, A., 2, B÷hmestrasse, Leipsic, Germany. Aug. 16, 1934, No. 23658. Convention date, Sept. 6, 1933. Addition to 425,152. [Class 81 (ii)] Gas-masks are made to fit the cheeks and forehead by the provision, along their inner edges a of integral or attached pads b shaped to conform to face on their inner surfaces and formed to a regular curve on the surfaces contacting with the mask. Alternatively a series of bosses c collectively of the same contour as the pads may be provided. A liner f covers the bosses c and may also be employed when the pads b are used. The liner f may be turned over and secured to the mask, along its outer edge, or may be formed by turning in the edge of the mask, or may be secured to the mask along its inner edge.
Patent GB-627305-A (GB)
Title: Thermionic valve circuit arrangements for producing electrical oscillations
IPC: H03B5/34
Filed: 1946-08-09
Abstract: 627,305. Valve generating circuits. PATELHOLD PATENTVERWERTUNGS- & ELEKTRO-HOLDING AKT.-GES. Aug. 9, 1946, No. 23693. Convention date, Aug. 18, 1945. [Class 40 (vi)] A valve oscillator circuit has both positive and nega. tive feedback which are applied to separate grids of a multi-grid valve, and is rendered oscillatory when the negative feedback is sub. stantially removed at the resonance frequency of a tuned circuit, the series resonant circuit having one side connected to earth and the other to the grid to which negative feedback is applied. The Fig. shows an oscillator in which positive feedback is obtained between anode and control grid by means of the transformer T which is tuned by its self capacity. Negative feedback due to the impedance Z in the screen grid circuit is removed at the resonant frequency of the tuned circuit S and the valve oscillates. The tuned circuit S may be replaced by a piezoelectric crystal which thus determines the frequency of oscillation. In a modification, Fig. 2 (not shown), the positive feedback is between anode and suppressor grid and the negative feedback between anode and control grid with the resonant circuit connected between the control grid and ground. In a further modification, Fig. 3 (not shown), a triode and pentode valve are reciprocally coupled, the negative feedback being between anode and screen-grid of the pentode valve as described in connection with Fig. 1. The Specification as open to inspection under Sect. 91 also describes an oscillator using a triode valve with both positive and negative feedback to the control grid, Fig. 3 (Cancelled, not shown). This subject-matter does not appear in the Specification as accepted.
Patent GB-1493997-A (GB)
Title: Preparation of beta-stage unsaturated polyester resins
IPC: C08F2/00
Filed: 1975-06-02
Abstract: 1493997 Catalyst compositions for the cure of unsaturated polyester resins SYNTEX (USA) Inc 2 June 1975 23786/75 Heading C3P Catalyst compositions for use in preparing B-stage unsaturated polyester resins comprise (a) a first catalyst comprising is an acyl, peroxyester or ketone peroxide and an unsubstituted or alkyl or acyl-substituted dicyclopentadienyl iron compound (ferrocene) and (b) a second, final cure, catalyst comprising di-tbutylperoxide, n-butyl-4,4-bis-(t-butylperoxy) valerate, dicumyl peroxide, 2,5-dimethyl-2,5- bis-(t-butylperoxy)hexane, 2,2-bis-(t-butylperoxy)butane or 2,2<SP>1</SP>-azobis-(isobutyronitrile). In component (a) the weight of peroxide is no more than 20 times that of the ferrocene. The B-stage resins are preferably prepared by ageing at 10-150‹ C. on mixture of (1) an unsaturated polyester resin comprising a condensation product of a dicarboxylic acid or anhydride and a polyhydric alcohol, if desired with a copolymerizable ethylenically unsaturated monomer; (2) 0À1-0À3% of the ferrocene and associated peroxide and (3) 0À05-1% of the final cure catalyst. The product may be cured by applying an elevated temperature, u.v. light or other radiation at 200-2000 p.s.i.
Patent GB-186810-A (GB)
Title: Improvements in curtain and like rod brackets
IPC: A47H1/102
Filed: 1921-09-07
Abstract: 186,810. James, J. H. Sept. 7, 1921. Clip brackets. - A curtain or like rod bracket has a rod seating 5 of open semicylindrical shape carrying a pin 7 which engages a bayonet-slot 9, 10 in a loose sleeve 8. The part 10 of the slot is formed as a circumferential groove by raising or spinning the metal of the sleeve to form a transversely corrugated rib which enables the sleeve to 'be readily turned within the limits provided by stops 11, 12. The part 9 of the groove may be formed by stamping.
Patent GB-382354-A (GB)
Title: Improvements in or relating to trawl nets
IPC: A01K75/06
Filed: 1931-08-25
Abstract: 382,354. Ropes. ROBERTSON, A., Fairview, Ferryhill, Aberdeen. Aug. 25, 1931, No. 23923. [Class 109.] A wire foot-rope 1 for a trawl net is covered with a layer 2 of rubber along its entire length. A woven or braided cotton covering 3 is preferably applied to the rubber layer, and is held in position by a wire binding 4. An outer covering 5 of vulcanized rubber formed with constrictions 6 for receiving the settings 7 may be provided.
Patent GB-1165488-A (GB)
Title: Modified Resins
IPC: C08K3/04
Filed: 1968-05-20
Abstract: 1,165,488. ABS resin compositions. POLYMER CORP. Ltd. 20 May, 1968 [2 June, 1967], No. 23958/68. Headings C3G and C3P. A homogeneous ABS resin-carbon black composition is made by mixing 70-30 parts by weight of a first ABS resin, 15-35 parts by weight of carbon black and 15-35 parts by weight of a wax having a melting point higher than 50‹ C. or an alkyl aryl phosphite or a mixture thereof until homogeneous and then diluting the mixture with the further ABS resin until the carbon black content is 0À5-5% by weight. The further ABS resin can be the same or different from the first ABS resin.
Patent GB-1236957-A (GB)
Title: Preparation of (cis-1,2-epoxypropyl)phosphonic acid and derivatives
Inventor: FIRESTONE RAYMOND ARMOND
IPC: C07F9/655
Filed: 1969-05-12
Abstract: 1,236,957. Preparing ( )(cis 1,2 - epoxypropyl) - phosphonic acid and derivatives thereof. MERCK & CO. Inc. 12 May, 1969 [15 May, 1968], No. 23974/69. Heading C2C. A ( )(cis 1,2 - epoxypropyl) - phosphonic acid diester is obtained by reacting 2-cyano-1 hydroxy-propene with a phosphite triester having the formula P(OR) 3 wherein R is a C 1 -C 5  alkyl, C 2 -C 5  alkenyl, mononuclear aralkyl, e.g. benzyl, or nitro-substituted mononuclear aryl, e.g. 4-nitro phenyl or 2,4-dinitrophenyl. The isomeric mixture of the ester derivatives of ( )(cis 1,2-epoxypropyl)-phosphonic acid obtained as product may be separated by gas- or adsorption chromatography to yield the ester derivatives of the ( ) cis and trans isomers and the esters of the ( ) cis acid can be converted to ( )(cis 1,2-epoxypropyl)- phosphonic acid, e.g. by U.V. irradiation, acid hydrolysis under buffered conditions, enzymolysis, or catalytic hydrogenation using Raney nickel and salts of the acid may be obtained by treating the acid with a suitable base or amine. Specified salts are the Na, Ca and Mg salts and the salts derived from diethylamine, benzylamine, ethylene - diamine, α- phenethylamine and quinine. The main reaction may be carried out in a solvent and is suitably effected at from 15  to 120  C. The products have antibacterial properties. Tri - (4 - nitrophenyl) - phosphite is obtained by adding PCl 3  to a solution of 4-nitrophenol and N,N-dimethylaniline in ether at 10  C.
Patent GB-458453-A (GB)
Title: An improved construction of shears or scissors
IPC: B23D29/02
Filed: 1935-03-18
Abstract: 458,453. Shears. UNITED WIRE WORKS, Ltd., Granton, and GREEN, W. D. T., 8, Oxford Terrace, both in Edinburgh. March 18, 1935, No. 24013. Divided out of 458,398, (Group XXII]. [Class 30] A tool for trimming the bifurcated ends of wire or of the warp wires of wire fabric comprises two parallel side cutters b separated throughout their length and each comprising a handle b<2> and cutting blade b<1>, and a central blade a having a handle a<2> pivoted at c to the side cutters.